Question

The isoelectric-point of a colloidially dispersed material is the pH value at which

• A. the dispersed phase migrate in an electric field.
• B. the dispersed phase does not migrate in an electric field.
• C. the dispersed phase has pH equal to 7.
• D. the dispersed phase has pH equal to zero.

Answer 1

Answer: (B)

At isoelectric point there is no migration of dispersed phase in an electric field.